def avg(a,b,c):
      return int((a+b+c)/3)
s={'小李':[77,54,57],'小张':[89,66,78],'小陈':[90,93,80],'小杨':[69,58,93]}
ss={}
for k,v in s.items(): 
      ss[k]=avg(v[0],v[1],v[2]) 
print(ss)